I am working on a short video for a client to display at a trade show. The plan to have a large HD TV on their stand with the video looping endlessly. My question is, what is the best (smallest and cheapest) way to get the the video playing on the screen. So far the options seem to be plugging in a laptop, blueray player or possibly an iPad. I wasn't sure if the blueray player would loop, it also seems to be tech that is fading away which makes me less keen to spans money on hardware of it. Laptops are a bit bulky, particularly if it has to be left open. My client uses Windows which I'm not really familiar with. An iPad seems like a neat option but I'm worried if the battery will last a whole day as the HDMI adapters don't allow it to be charged at the same time. Any ideas?